| 高熵合金FeCoNiTi的微观组织演变和强韧化行为 |
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| 引用本文： | 刘怡,徐康,涂坚,黄灿,吴玮,谭力,张琰斌,尹瑞森,周志明.高熵合金FeCoNiTi的微观组织演变和强韧化行为[J].材料研究学报,2020,34(7):535-544. |
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| 作者姓名： | 刘怡 徐康 涂坚 黄灿 吴玮 谭力 张琰斌 尹瑞森 周志明 |
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| 作者单位： | 1.重庆理工大学材料科学与工程学院 重庆 4000542.重庆理工大学 重庆市模具技术重点实验室 重庆 4000543.重庆大学航天航空学院 重庆 400044 |
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| 摘 要： | 使用热力学软件设计了一种新型双相高熵合金(FeCoNiTi)，利用真空电弧熔炼和热处理制备出FeCoNiTi高熵合金块体材料。表征结果表明，FeCoNiTi高熵合金由层状结构的Laves相和魏氏体板条FCC相组成。在室温下FeCoNiTi高熵合金具有良好的综合力学性能(抗压强度σb=2.08 GPa，压缩应变ε=20.3%)。高强度来自“硬”Laves相(层状结构)的强化，而“软”FCC相(魏氏体板条)中的位错滑移和变形孪晶提供塑性。
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| 关 键 词： | 金属材料 高熵合金 强韧化 双相组织 魏氏体板条 |
| 收稿时间： | 2019-12-02 |
Microstructure Evolution and Strength-ductility Behavior of FeCoNiTi High-entropy Alloy |
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| LIU Yi,XU Kang,TU Jian,HUANG Can,WU Wei,TAN Li,ZHANG Yanbin,YIN Ruisen,ZHOU Zhiming.Microstructure Evolution and Strength-ductility Behavior of FeCoNiTi High-entropy Alloy[J].Chinese Journal of Materials Research,2020,34(7):535-544. |
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| Authors: | LIU Yi XU Kang TU Jian HUANG Can WU Wei TAN Li ZHANG Yanbin YIN Ruisen ZHOU Zhiming |
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| Abstract: | A new type of dual-phase high-entropy alloy (FeCoNiTi) was designed by means of thermodynamic software and then block material of FeCoNiTi high-entropy alloy was prepared via vacuum arc smelting and then heat treatment. Characterization results demonstrate that the as-homogenized FeCoNiTi alloy presents dual-phase microstructure composed of the lamellar structure (hexagonal close packed (Laves) phase) and the Widmanstätten laths (face-centered cubic (FCC) phase). The FeCoNiTi alloy shows excellent comprehensive property at room temperature with compressive strength σb=2.08 GPa and compression strain ε=20.3%. The high strength can mainly be attributed to the hard Laves phase (lamellar structure) strengthening; while dislocation slip and deformation twin in the soft FCC phase (Widmanstätten laths) provide the ductility. |
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| Keywords: | metallic materials high entropy alloy strength-ductility dual-phase widmanstätten laths |
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